.game-board-container{display:flex;flex-direction:column;align-items:center;gap:20px}.game-board{display:flex;flex-direction:column;gap:2px;background:#333;padding:10px;border-radius:15px;box-shadow:0 10px 30px #0003;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.board-row{display:flex;gap:2px}.board-square{width:50px;height:50px;border-radius:8px;display:flex;align-items:center;justify-content:center;cursor:pointer;position:relative;font-size:1.5rem;font-weight:700;transition:all .2s ease;border:2px solid transparent;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.board-square:hover{border-color:#ffffff80}.board-square.queen{border-color:gold;box-shadow:0 0 15px #ffd70080}.board-square.excluded{opacity:.6}.queen-icon{font-size:1.8rem;filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}.excluded-icon{font-size:1.5rem;color:#000;font-weight:700}.board-instructions{display:flex;gap:20px;margin-top:10px}.instruction-item{display:flex;align-items:center;gap:8px;font-size:.9rem;color:#666}.instruction-icon{font-size:1.2rem}.game-rules{margin-top:20px;padding:15px;background:#f8f9fa;max-width:500px}.game-rules h3{margin:0 0 10px;color:#333;font-size:1.1rem;font-weight:700}.game-rules ul{margin:0;padding-left:20px;color:#555;font-size:.9rem;line-height:1.4;text-align:left}.game-rules li{margin-bottom:5px}.game-rules p{margin-top:15px;font-size:.8rem;color:#555}@media (max-width: 768px){.board-square{width:40px;height:40px;font-size:1.2rem}.queen-icon{font-size:1.4rem}.excluded-icon{font-size:1.2rem}.board-instructions{flex-direction:column;gap:10px;text-align:center}}@media (max-width: 480px){.board-square{width:35px;height:35px;font-size:1rem}.queen-icon{font-size:1.2rem}.excluded-icon{font-size:1rem}}.level-selector{text-align:center;padding:20px;max-width:1200px;margin:0 auto}.level-title{color:#333;margin-bottom:10px;font-size:2.5rem;font-weight:700}.level-description{color:#666;margin-bottom:30px;font-size:1.1rem;line-height:1.5}.puzzle-groups{display:flex;flex-direction:column;gap:30px;max-width:1200px;margin:0 auto;padding:20px}.puzzle-group{text-align:center}.group-title{color:#333;margin-bottom:15px;font-size:1.5rem;font-weight:700}.puzzles-grid{display:block;text-align:center;max-width:600px;margin:0 auto}.puzzle-square{width:60px;height:60px;background-color:#f0f0f0;border:2px solid #ddd;border-radius:8px;display:inline-block;vertical-align:top;margin:4px;cursor:pointer;position:relative;font-size:.8rem;font-weight:700;color:#333;transition:all .2s ease;text-align:center;line-height:60px}.puzzle-square.completed{background-color:#4caf50;border-color:#2e7d32;color:#fff}.puzzle-square:hover{transform:scale(1.05);box-shadow:0 4px 12px #0003}.completion-check{position:absolute;top:2px;right:2px;font-size:.6rem;color:#fff;background-color:#2e7d32;border-radius:50%;width:16px;height:16px;display:flex;align-items:center;justify-content:center}.puzzle-tooltip{position:absolute;bottom:100%;left:50%;transform:translate(-50%);background-color:#333;color:#fff;padding:8px 12px;border-radius:6px;font-size:.7rem;white-space:nowrap;z-index:1000;margin-bottom:8px;pointer-events:none}@media (max-width: 768px){.puzzle-groups{gap:20px;padding:10px}.group-title{font-size:1.3rem}.puzzles-grid{gap:6px}.puzzle-square{width:60px;height:60px;font-size:.7rem;line-height:60px;margin:3px}.level-title{font-size:2rem}.level-description{font-size:1rem}}@media (max-width: 480px){.puzzle-groups{gap:15px}.group-title{font-size:1.1rem}.puzzle-square{width:50px;height:50px;font-size:.6rem;line-height:50px;margin:2px}}.game-stats{margin-bottom:20px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:15px;margin-bottom:20px}.stat-item{background:white;padding:15px;border-radius:12px;box-shadow:0 4px 12px #0000001a;text-align:center;transition:all .3s ease}.stat-item:hover{transform:translateY(-2px);box-shadow:0 6px 20px #00000026}.stat-label{font-size:.8rem;color:#666;margin-bottom:5px;font-weight:500}.stat-value{font-size:1.2rem;font-weight:700;color:#333}@media (max-width: 768px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:10px}.stat-item{padding:12px}.stat-value{font-size:1rem}}.app{min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px}.game-container{background:rgba(255,255,255,.95);border-radius:20px;padding:30px;box-shadow:0 20px 40px #0000001a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);max-width:800px;width:100%;text-align:center}.game-title{font-size:3rem;font-weight:700;margin-bottom:30px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:flex;justify-content:center;gap:10px}.puzzle-text{color:#764ba2}.win-screen{text-align:center;padding:40px}.win-screen h2{font-size:2.5rem;margin-bottom:20px;color:#4caf50}.win-screen p{font-size:1.2rem;margin-bottom:30px;color:#666}.play-again-button{background:linear-gradient(135deg,#4CAF50 0%,#45a049 100%);color:#fff;border:none;padding:15px 30px;border-radius:25px;font-size:1.1rem;font-weight:700;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #4caf504d}.menu-button{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;border:none;padding:12px 24px;border-radius:20px;font-size:1rem;font-weight:700;cursor:pointer;margin-top:20px;transition:all .3s ease;box-shadow:0 4px 15px #667eea4d}@media (max-width: 768px){.game-container{padding:20px;margin:10px}.game-title{font-size:2rem;flex-direction:column;gap:5px}.win-screen h2{font-size:2rem}}